Sources
Every standard, manual, measurement and paper we cite, and what we use it for.
We group sources by the kind of evidence they are, because a building code, a manufacturer’s advice, a lab measurement and a rule of thumb deserve different weight. Pages cite the specific source for each figure.
Standards and codes
- ASTM International (2022). ASTM E413-22: classification for rating sound insulation.
Single-number ratings don’t suit music spectra. - ASTM International (2021). ASTM E989-21: impact sound rating.
Impact ratings don’t cover sound below 100 Hz. - AVIXA. Display image size for 2D content (DISCAS) and display-size guidance.
Content-legibility display sizing (the source of “4/6/8”-style ratios) for meeting and classroom displays. - CEDIA / CTA (2023). CEDIA/CTA-RP22 Immersive Audio Design Recommended Practice, v1.2.
The 61° maximum viewing angle for 4K video it cites, listener-to-wall distances, speaker aiming, back-wall seating advice, decay-time and bass-consistency targets. - EBU (2004). Tech 3276: Listening conditions for the assessment of sound programme material.
Reference room proportions and early-reflection limits. - EBU. EBU R 95: Safe areas for 16:9 television production.
Title-safe and action-safe areas. - HDMI Licensing Administrator (2025). HDMI 2.2 specification and Ultra96 cables.
HDMI 2.2 (June 2025) up to 96 Gbps; Ultra96 cable certification. - Human Factors and Ergonomics Society (2007). ANSI/HFES 100-2007 Human Factors Engineering of Computer Workstations (§5.2.4.3).
Workstation screens below eye level; looking up with the head tilted back can cause discomfort. - International Code Council (2021). International Residential Code 2021, Chapter 10: chimneys and fireplaces (R1001.11).
Combustible mantel and trim clearances for masonry fireplaces (as locally adopted). - International Code Council (2021). International Residential Code 2021, Chapter 3: building planning.
Ceiling heights, stairs, guards, egress and room minimums (as locally adopted). - International Code Council (2021). International Residential Code 2021, Chapter 4: foundations.
Foundation drainage, dampproofing and waterproofing. - International Code Council (2021). International Building Code 2021, §1206: sound transmission.
Walls and floors between dwelling units: STC 50 / IIC 50 in lab tests (ASTM E90, E492), or NNIC 45 / NISR 45 in field tests (E336, E1007). - ITU-R (2012). Recommendation ITU-R BT.2022: General viewing conditions for subjective assessment of SDTV and HDTV.
Design viewing distances: 4.8 picture heights for 720p, 3.2 for 1080p, 1.6 for 4K. - ITU-R (2010). Recommendation ITU-R BT.1845: Guidelines on metrics for image systems including optimal viewing distances.
Design viewing distances at one pixel per arcminute: 3.2 picture heights for 1080 lines, 1.6 for 4K. - ITU-R (2012). Recommendation ITU-R BS.775-3: Multichannel stereophonic sound system with and without accompanying picture.
5.1 reference layout: fronts at ±30°, surrounds at 100–120°. - ITU-R (2015). Recommendation ITU-R BS.1116-3: Methods for the subjective assessment of small impairments in audio systems.
Listening-room reference conditions: ear height, reverberation time and early reflections. - ITU-R (2025). Recommendation ITU-R BT.2100-3: HDR television (Table 3, reference viewing environment).
A D65 neutral surround of 5 cd/m² for critical HDR viewing. - SMPTE (2017). ST 2080-3:2017 Reference Viewing Environment for Evaluation of HDTV Images.
Reference viewing distance (3 to 3.2 picture heights, about 31–33°) and the ±30° horizontal / ±15° vertical observer envelope. - UL Standards & Engagement (2023). UL 2442, Wall- and Ceiling-Mounts and Accessories (Ed. 2, rev. 2023): scope.
The safety standard for wall and ceiling mounts (not carts or stands). - VESA. Flat Display Mounting Interface (FDMI) overview.
The VESA mounting-hole patterns (horizontal × vertical, in millimeters) and interface families.
Government guidance
- Federal Trade Commission (2018). Deceptive Advertising as to Sizes of Viewable Pictures Shown by Television Receiving Sets: repeal (83 FR 50484).
The old US rule on stating TV picture sizes, repealed effective January 7, 2019. - US Access Board. ADA Standards, Chapter 3: turning space, reach ranges, operable parts.
60-in turning circle; 15–48-in forward reach; controls usable with one hand. - US Access Board. Guide to the ADA Accessibility Standards, Chapter 4: Accessible routes (§403.5).
36-inch clear width for accessible routes. - US Consumer Product Safety Commission. Anchor It!: TV and furniture tip-over prevention.
Anchor both the TV and the furniture under it. - US Consumer Product Safety Commission. Go cordless: window covering safety.
Cordless blackout shades where children live or visit. - US Consumer Product Safety Commission. Button cell and coin battery information center.
Keep remote batteries secured; a swallowed coin cell is an emergency. - US Consumer Product Safety Commission (2023). ASTM F1542 task group on recliner entrapment: meeting log.
Children trapped under power footrests and lift mechanisms. - US Consumer Product Safety Commission (2024). CPSC reminds families to tackle the deadly hazard of TV and furniture tip-overs (release 24-115).
Anchor TVs and furniture; tip-over injury and fatality figures. - US Consumer Product Safety Commission. Clothing Storage Units (STURDY Act rule, 16 CFR 1261).
The STURDY rule covers clothing storage, not TV stands or entertainment furniture. - US Environmental Protection Agency. A brief guide to mold, moisture and your home.
Keep humidity below 60%, ideally 30–50%; dry wet materials within 24–48 hours. - US Environmental Protection Agency. Health risk of radon.
Fix homes at 4 pCi/L or more; consider fixing at 2–4.
Manufacturers’ documentation
- Acoustimac. Acoustic panels, baffles and bass traps FAQ.
Treat 25–30% of all hard surfaces; parallel-wall slap echo. - Anthem. MRX/AVM manual §5.4: level calibration.
Set each channel’s test noise to 75 dB SPL at the seat with a C-weighted meter. - Apple. High-quality video formats on Apple TV.
At least 25 Mbps for 4K purchases and rentals. - Apple. Wi-Fi and Ethernet specifications for Apple devices.
Which Apple TV models have Ethernet; Ethernet recommended where available. - Ashley. Nerviano manual recliner (1080329).
4 in from the wall; 66 in long fully reclined. - Ashley. Valeview manual recliner (5320425).
12 in from the wall. - BenQ. V5000i ultra-short-throw projector specifications.
Ultra-short-throw placement distances and brightness. - BenQ (2024). What is a good throw ratio and why does it matter?.
Throw ratio = throw distance ÷ image width. - Bose (2021). Bass Module 500 owner’s guide.
Front third of the room, at least 3 in from other surfaces; closer to walls means more bass. - Bose (2026). Soundbar placement: Lifestyle Ultra Soundbar.
Top of a wall-mounted bar at least 4 in below the TV; front flush with the shelf edge. - Bose. Surround Speakers owner’s guide (772083).
Surrounds at ear height or higher at the back of the room. - Denon. AVR-X3800H owner’s manual: crossovers, low-pass filter and Audyssey setup.
80 Hz default crossover; LFE low-pass at 120 Hz; Audyssey mic at the main seat first, six to eight positions within 2 ft. - Denon. How much ventilation does my receiver need?.
At least 6 in above and 2 in each side of a Denon receiver. - Denon. AVR-S760H manual: Dialog Enhancer.
Lifts the center channel’s speech band, per source. - Denon. AVR-X3800H manual: Audio Delay.
0–500 ms of audio delay; Auto Lip Sync may not work with every TV. - Denon. AVR-S770H manual: no picture.
HDMI black screens: inputs, cables, formats and HDCP. - Denon (2023). Equipment required for Dirac Live Room Correction.
Dirac Live runs from a Windows or Mac computer; UMIK-1 recommended with its _90deg calibration file, on a boom stand facing the ceiling; the supplied Audyssey mic is not compatible. Read Oct 8, 2026. - Denon (2023). Measuring with Dirac Live software.
Computer and receiver on the same network; measure, select Bass Control, Calculate, Export Filter to a slot; Wide Imaging for more than two people or multiple rows. Read Oct 8, 2026 (via an Astra fact-check). - Denon. AVR-X3800H: connecting 11.1-channel speakers.
An external amplifier on one channel pair, set to Pre-out Only. - Dirac (2025). Dirac ART available for Denon and Marantz.
Active Room Treatment as a $299 upgrade on selected receivers. - Dirac. Dirac Live pricing.
Room Correction from $99 (an upgrade) to $349, Bass Control $299, ART $299, depending on the receiver. - Dirac (2026). Dirac Live for Denon AVR-X3800H.
Room Correction $259 (to 500 Hz) or $349 (full range); Bass Control $299; the pair as a bundle $599 on sale, Oct 6, 2026. - Disney+. Recommended internet speeds.
25 Mbps for 4K. - Dolby (2025). How to set up your bias light for Dolby Vision content creation.
D65 (6500 K), dimmable, on a neutral grey wall, at about 5 nits. - Dolby (2025). TCL brings Dolby Atmos FlexConnect to 2025 QD-Mini LED TVs.
Wireless speakers placed anywhere, tuned by the TV: TCL QM6K–QM8K with up to four Z100s. - Dolby (2023). What is Dolby Digital Plus JOC?.
Streaming Atmos rides in lossy Dolby Digital Plus. - Dolby. Dolby TrueHD.
Lossless, up to 18 Mbps on Blu-ray. - Dolby Laboratories (2018). Dolby Atmos Home Theater Installation Guidelines, r3.1.
Speaker angles for 5.1, 7.1 and Atmos layouts, ear-height placement and overhead speaker positions. - Dolby Laboratories. Home Theater Speaker Guide: 5.1 and 5.1.2 setup sheets.
Dolby’s current consumer diagrams: fronts at 22–30°, 5.1 surrounds at 110–120° (its 2018 installation guide draws 90–110°). - Epson. Pro Cinema LS12000 user’s guide.
Room around the projector; no closed cabinet without proper ventilation; throw ratio and brightness. - Epson. Home Cinema projector user’s guide (screen size and projection distance tables).
Throw-distance tables. - Epson. Home Cinema 3800 specifications.
Throw ratio 1.32–2.15; 3,000 lumens; price observed October 4, 2026. - Epson. Projector guide: color brightness.
At least 1,500 lumens for a dark home theater, 2,500 for rooms with windows. - Ergotron. VESA mounting guide.
How VESA patterns are stated and matched to mounts. - Fortress Seating. Theater seating specifications.
Recliner footprints, reclined depth and riser guidance. - Genelec (2022). Not enough bass: do I have a back-wall cancellation?.
A speaker 86 cm from the wall behind it cancels near 100 Hz; EQ can’t fill it, placement can. - Genelec. How to place your monitors.
Boundary gain: up to +6 dB per wall, +12 dB in a wall–floor junction, +18 dB in a corner (idealized). - GIK Acoustics (2026). How thick should acoustic panels be?.
2 in minimum for speech; 4 in or more for music and cinema; air gaps extend the bass. - GIK Acoustics (2012). The basics of bass traps and diffusion panels.
Flutter and slap echo as targets for absorption or diffusion. - HBO Max. Watch in 4K Ultra HD.
25 Mbps or more for 4K; 50 Mbps or more recommended. - Heat & Glo. Mounting a TV above your gas fireplace.
Heat-management systems that let a TV sit closer above some gas fireplaces. - Hisense USA (2026). Hisense pioneers the evolution of RGB MiniLED at CES 2026.
RGB Mini-LED announced across 55–100 in for 2026. - Hisense USA (2026). U7SG Quick Setup Guide.
Operating temperature 41–95°F. - Hisense USA. PX3-PRO ultra-short-throw projector.
Throw ratio 0.22; 80–150 in; 3,000 ANSI lumens; price observed October 4, 2026. - Hisense USA. PX3-Pro bundle with ALR screen.
Projector plus 100-inch ALR screen, price observed October 4, 2026. - IKEA US. How to choose a TV bench that’s right for your home.
Choose a bench wider than the TV screen. - IKEA US. BESTÅ TV unit 205.752.28: product details.
An example of a TV unit’s weight limit on top (55 lb) separate from the TV sizes it suits. - KEF (2025). To toe-in or not to toe-in.
Start at 0° for Uni-Q speakers and adjust in small steps; unequal side walls can justify unequal angles. - KEF. R11 Meta specifications.
90 dB at 2.83 V/1 m, 4 Ω nominal (3.2 Ω minimum), 15–300 W. - KEF. A guide to impedance.
Impedance varies with frequency; the minimum matters to the amplifier. - KEF. Subwoofer Setup Tips For Apartment Living.
Avoid corners in apartments; isolation feet reduce transmission by about a decibel or less. - KEF (2025). Phase and positioning: where to place a subwoofer.
Away from walls by a third or a fifth of the room; avoid corners if against a wall. - KEF (2020). KC62 subwoofer user manual.
Phase control and an apartment mode that cuts very low bass. - KEF. 10 tips for speaker placement.
300–1000 mm from the front wall; avoid close side walls. - Klipsch. Thumping or humming noise from the subwoofer.
Ground loops: common grounded circuit, a line isolation transformer, never a cheater plug. - Klipsch (2018). Reference Subwoofers owner’s manual (2018, v02).
Corner placement for more output; the 0/180° phase switch. - Klipsch (2021). How to set up Klipsch speakers.
Center right above or below the screen, flush with the shelf edge; surrounds about 3 ft above heads. - La-Z-Boy. Finley wall recliner (016747).
About 7 in from the wall to recline fully. - La-Z-Boy. Pinnacle Power Wall Recliner (16X512) dimensions.
A recliner’s fully extended depth (64.5 in) for row spacing. - LG (2026). How to use HDMI-CEC (SIMPLINK).
LG’s name for CEC and its linked power behavior. - LG. TV accessibility features.
Captions set on the box that renders them; Clear Voice dialogue processing. - LG Electronics (2026). OLED C6 Safety and Reference manual (MFL058141092607REV01).
Do not install near heat sources; operating temperature 32–104°F. - LG Electronics (2025). How to measure and read TV sizes.
Middle of the screen at eye level or slightly below; higher for beds with an adjustable mount. - LG Electronics (2026). 100-inch QNED84B (100QNED84BU).
A 100-inch TV’s price, weight and dimensions (observed October 4, 2026). - Logitech. Harmony remote support notice (legacy models).
Harmony hardware ended in 2021; listed legacy remotes lost reprogramming on May 28, 2025. - MantelMount. MM540 Enhanced pull-down mount: specifications.
A pull-down mount’s drop, tilt, weight range and price (checked October 4, 2026). - MantelMount (2024). MantelMount answers your frequently asked questions.
Heat-sensing handles change color above 110°F. - Napoleon (2023). BLP42/46 gas fireplace installation and operation manual (W415-4038/A).
Mantel clearances for one gas fireplace, and its note that TV configurations tested are not a guarantee. - Netflix. Internet connection speed recommendations.
15 Mbps or higher for 4K. - Netflix (2019). Bringing studio-quality sound to Netflix.
Atmos streams at 448–768 kbps depending on device and bandwidth. - Octane Seating. Riser platform and Flex HR riser series: dimensions.
Platforms 7¾ or 14½ in; built-on riser 8 in; 69 in fully reclined. - Paradigm (2019). Where should I place speakers?.
At least 8 in from the wall behind; spacing 0.75–1× the listening distance; toe-in crossing just behind you. - Peerless-AV. DS-VW650 assembly instructions: masonry anchoring.
Anchor into solid block, never mortar joints; the wall must hold four times the load. - Peerless-AV. A6X4 mount datasheet.
UL listed and tested to four times its rated load: a test margin, not extra capacity. - Pottery Barn. The coffee table buying guide.
About 18 in between coffee table and sofa; table about two-thirds the sofa’s length. - Primacoustic (2023). How much acoustic treatment do I need?.
Start with 15–25% of wall area; 25% or more for theaters. - Primacoustic (2023). Acoustic panel placement: the mirror trick.
Find first-reflection zones with a mirror from each seat. - Samsung. TV and audio accessibility.
Audio description versus Voice Guide; Multi-output Audio for TV speakers and headphones together. - Samsung (2025). HW-Q990F / Q930F / Q800F user manual.
Soundbar-to-TV gaps and rear speaker angles (135–150°). - Samsung. What size TV should I get?.
TV size is the diagonal of the screen itself; check the cabinet dimensions for fit. - Samsung (2024). HW-Q990D user manual.
Wall-mounted bar at least 2 in below the TV; 2 cm from the panel on a console; rears at 135–150°. - Samsung US Support. Where to mount the TV.
TV center at about 42 in, the distance ÷ 0.55 rule of thumb, and the fireplace warning (keep the TV below 40°C / 104°F). - SANUS. VLF728 full-motion mount: installation manual.
Wood studs, solid concrete or concrete block only, never drywall alone; stud and drywall limits. - SANUS. SSMK1 steel-stud mounting kit: instructions.
Metal studs need a kit made for them; the wall must hold five times the TV and mount. - SANUS. VLT5 tilting wall mount: instruction manual.
Drill into stud centers; on concrete, never into the mortar between blocks. - SANUS. VLF628 full-motion mount: instruction manual.
Do not install into drywall alone; the wall must hold five times the TV plus mount weight. - SANUS. HeightFinder: TV mounting height.
Screen centered at seated eye level, averaging 42 in. - Screen Innovations. Short-throw / ambient-light-rejecting screen materials.
Why UST projectors need a matched ALR screen. - Seatcraft. Two-row home theater seating.
Risers 6–12 in (often 8 or 10); platform 6–8 ft deep. - Sonos. Sonos Arc Ultra user guide (placement).
At least 4 in between soundbar and TV; bar at the front edge; never in a cabinet. - Sonos. Sonos Beam (Gen 2) user guide (select a location).
At least 2 in from the TV; keep the IR sensor clear; shelf clearances. - Sonos. Sub 4 user guide: select a location.
Where a Sonos Sub can go (including under furniture with 1 in clearance). - Sonos. Surround sound guidelines and limitations.
Surrounds behind and to either side of the usual seat. - Sonos. Era 100 user guide: set up surrounds.
Surrounds about 10 ft from the favorite seat, with 8 in of clearance around each. - Sony. No sound from ARC/eARC: troubleshooting.
The checklist for eARC/ARC sound: HDMI control on, ARC/eARC set to Auto, the labeled port, one device at a time. - Sony. STR-AN1000 operating instructions: placement.
No bookcase or built-in cabinet; vents uncovered. - Sony. HDMI-CEC (BRAVIA Sync) help.
CEC may not work across brands; not every implementation is compatible. - Sony. Dolby Atmos doesn’t play from a Blu-ray player.
Pick the Atmos track; turn off BD secondary audio. - Sony Electronics (2025). K-65XR80M2 specifications (BRAVIA 8 II).
A “65-inch class” TV with a 64.5-inch measured diagonal; weight and VESA pattern. - Sony Electronics (2026). BRAVIA 6 Safety and Other Information (5-079-179-11).
Do not install near heat sources; operating temperature 32–104°F. - Sony Electronics (2025). Television Limited Warranty (4-595-333-04).
Excludes damage from heat and from not following installation instructions. - Sony Electronics (2025). BRAVIA Theatre Bar 9/8 help guide (installation).
Soundbar clearances: don’t hide the IR sensor; 120 or 200 mm under a wall-mounted TV. - Sony Electronics Support (2025). Recommended viewing distance for watching TV.
Minimum reference distances: 1.5 × screen height for 4K, 3 × for HD. - Sony Electronics Support (2021). The sound bar is blocking the IR sensor of the TV.
Move a soundbar that blocks the TV’s remote sensor; use the bar’s IR repeater only if needed. - Sony Electronics Support (2019). What is the recommended height when mounting the TV on a wall?.
Screen center at viewers’ eye level. - Starkey (2025). Starkey partners with LG on Auracast TV accessibility.
Hearing aids streaming straight from 2025 LG TVs via Auracast. - Stewart Filmscreen. What is the half-gain angle?.
Screen gain and viewing cone. - SVS. The Art of Subwoofer Placement.
Front-wall and corner starting points and the subwoofer crawl. - SVS. Speaker Placement Guide for Home Audio.
Front, surround and rear speaker angles. - SVS. Center Channel Speaker Placement Tips.
Center speaker above or below the screen, and tilting it toward the listeners. - SVS (2020). What is subwoofer room gain?.
Room gain below the lowest room mode barely depends on where the sub sits. - SVS (2020). Subwoofer calibration and tuning: getting the bass just right.
Phase at 0 and low-pass filter off before running receiver calibration. - TCL (2026). 65–85QM8L Quick Start Guide (US).
No installation near heat sources; operating temperature 41–95°F. - Totem Acoustic (2024). A guide to running and fishing wires for in-ceiling and in-wall speakers.
Template, drywall saw, joist holes centered and 2 in from the edges, fish rods past insulation. - Valencia Theater Seating. Tuscany home theater seating with risers.
Riser adds 7 in. - Vogel’s (2025). TV on the wall: wall types.
Different fixings for solid brick and concrete, hollow block and plasterboard. - Vogel’s (2025). Hang your television at the ideal height.
Eye level or slightly below; about 60 in to the screen center for viewing from bed. - XGIMI (2026). How to place a center channel speaker with a UST projector.
Center below the image on the console, clear of the beam and vents; above the screen, angled down, as the alternative. - Yamaha. RX-A4A/A6A/A8A safety brochure.
30 cm above, 20 cm at the sides and back.
Lab measurements
- Audio Science Review (2024). KEF R11 Meta tower speaker review.
Klippel NFS of the R11 Meta: controlled directivity, a dip near 1.2 kHz and a bass shelf. - Audio Science Review (member Nuyes) (2023). KEF R6 Meta measurements and review.
A member’s Klippel measurements of the R6 Meta center: well-controlled coverage. - Audioholics (2024). HSU VTF-TN1 subwoofer review.
CEA-2010 at 2 m RMS: about 104 dB at 16 Hz, 107 at 20 Hz and 118 at 63 Hz (one port). - Audioholics (2023). Monoprice Monolith M2100X/M3100X/M5100X amplifier review.
M2100X: 97 W/ch into 8 Ω and 134 W/ch into 4 Ω, two channels driven, full bandwidth, 0.1% THD+N. - Auralex Acoustics (2021). Corner-mount bass trap test report (C423).
Measured low-frequency absorption of a corner trap. - AVS Forum (2026). TCL 75-inch QM7L review.
2,840 nits in a 10% HDR window, 788 full screen, Filmmaker Mode. - Blu-ray.com (2024). Land of the Dead 4K Blu-ray review (bitrates).
Feature video averaged 85.0 Mbps; TrueHD Atmos averaged 4.3 Mbps. - Blu-ray.com (2025). The Place Beyond the Pines 4K Blu-ray review (bitrates).
Feature video averaged 79.2 Mbps. - Blu-ray.com (2026). Hail, Caesar! 4K Blu-ray review (bitrates).
Feature video averaged 79.0 Mbps. - DisplayMate Technologies (2015). OLED vs LCD TV Shoot-Out.
Screen reflectance measurements. - eCoustics (2026). TCL QM8L TV review (2026).
Tested the 75-inch: about 2,000 nits peak and 708 full screen in Filmmaker mode, stabilized; anti-reflection reduces overhead glare. - Erin’s Audio Corner (2023). KEF R3 Meta review.
Klippel NFS / CTA-2034: smooth directivity; bass distortion rises at high output, so cross it to the subs. - FlatpanelsHD (2019). Apple TV+ 4K bitrate measurements.
Named Apple TV+ shows averaged 26–29 Mbps video in 2019. - FlatpanelsHD (2026). TCL X11L (SQD-miniLED) review.
Tested the 98-inch (June 2026): 4,472 nits on a 10% HDR window, 735 full screen; blooming and off-axis limits remain. - Müller-BBM / Création Baumann (2018). MEGACOUSTIC curtain: sound absorption (Müller-BBM M102794/35).
The same curtain flat versus fully pleated, 150 mm from the wall. - PCMag (2026). TCL 75QM8L review.
Tested the 75-inch: 3,956 nits peak and 773 full screen in HDR10 Movie mode; four 4K 144 Hz HDMI inputs. - Riverbank Acoustical Laboratories / Auralex (2013). SonoFlat 2-inch Studiofoam: sound absorption test (RAL-A13-123).
Foam does absorb: 0.21 at 125 Hz rising to about 1.1 from 500 Hz. - Riverbank Acoustical Laboratories / Auralex (2013). SonoLite 3-inch bass-trap panel: sound absorption test (RAL-A13-140).
A thicker panel: 0.55 at 125 Hz. - RMIT / Interface (2015). CushionBac RE carpet tile: sound absorption report (RMIT 15-112).
Floor covering absorbs almost nothing at 125 Hz. - ROCKWOOL. ROCKBOARD 40/60 multi-purpose board — sound absorption data.
Absorption by thickness: why 2-inch panels stop working in the bass. - RTINGS (2026). TCL QM7L review.
Replaced the QM7K; HDMI 2.1 bandwidth on HDMI 1 and 2 only, not on the eARC port; tested the 65-inch. - RTINGS (2026). LG C6H OLED review.
The 77- and 83-inch C6 sizes are the C6H, a different panel reviewed separately from the 55–65-inch C6. - RTINGS.com. TV viewing angle test.
How color and contrast hold up off-axis by panel type. - RTINGS.com. Reflections test: total reflected light and direct reflections.
How much light different screen finishes reflect. - RTINGS.com. Screen finish and reflection handling (research article).
Matte versus glossy screen finishes in bright rooms. - Silent Gliss. Polyflax curtain acoustic test (100% fullness, 20 cm from wall).
How much a heavy curtain absorbs, and why fullness and air gap matter. - Tom’s Guide (2026). TCL X11L SQD-Mini LED TV review.
Tested the 85-inch: 2,679 nits on a 10% HDR window; four HDMI 2.1 ports, 4K 144 Hz. - US Army Natick / Penn State Open Lab (2012). ANSUR II Anthropometric Survey of US Army Personnel (public data).
Seated eye height and head height distributions used for the seated-viewer models.
Research and textbooks
- Harman (2002). Subwoofers: optimum number and locations (Welti).
Two subs at opposing wall midpoints nearly as good as four; the 1/4–3/4 front-wall pair examined as a rule of thumb. - Home Theater Guides. How Room Studio works (methods and limits).
Our own simulations: what the models compute and what they leave out. - Human Factors and Ergonomics Society (2000). Visual display height (Burgess-Limerick, Mon-Williams & Coppard), Human Factors 42(1).
Monitor study: viewing targets at least 15° below eye level; higher targets increased neck extension. - Journal of the Acoustical Society of America (1979). Image method for efficiently simulating small-room acoustics (Allen & Berkley).
The image-source method behind our reflection paths and bass map. - Journal of the Acoustical Society of America 37 (1965). Computed frequency and angular distribution of the normal modes of vibration in rectangular rooms (Sepmeyer).
Room ratios; no clearly defined optimum. - Journal of the Audio Engineering Society / Harman (2006). Low-Frequency Optimization Using Multiple Subwoofers (Welti & Devantier).
Two or four subwoofers at wall midpoints or corners even out bass across seats; real-room Table 4: one corner sub 33.4 dB², two at wall midpoints 23.7, best two 14.3, optimized 8.0. - Journal of the Audio Engineering Society / Harman (2006). Loudspeakers and Rooms for Sound Reproduction — A Scientific Review (Toole).
Early reflections, room modes and listener preferences. - National Research Council Canada (2001). Acceptable party wall sound insulation criteria (Bradley), Canadian Acoustics 29(3).
Measured party walls in 300 Canadian home pairs: apparent STC 38–60, mean 49.8. - Netflix Technology Blog (2020). Optimized shot-based encodes for 4K.
Top 4K encodes averaged 8 Mbps across a 100-title test set. - OpenStax. University Physics Volume 3, §2.1 Images formed by plane mirrors.
Angle of incidence equals angle of reflection: where window reflections land on a screen. - Routledge (2018). Sound Reproduction: The Acoustics and Psychoacoustics of Loudspeakers and Rooms, 3rd ed. (Floyd Toole; ISBN 9781138921368).
How rooms change what we hear: room modes, early reflections and why bass is the room’s biggest problem.
Professional guidance
- BBC. Subtitle Guidelines.
Subtitle line height relative to the picture. - Best Buy. How do you mount a TV to the wall?.
Center of the screen at seated eye level. - Blu-ray Disc Association (2017). Ultra HD Blu-ray benefits: bitrate and capacity.
Up to 108 Mbps on 66 GB discs and 128 Mbps on 100 GB discs (format ceilings). - Bluetooth SIG. Auracast broadcast audio FAQ.
Auracast needs specific LE Audio features, not just a Bluetooth version number. - Bluetooth SIG (2026). Auracast broadcast audio transforms the home theater experience.
Hisense among the first to send surround channels over LE Audio/Auracast. - CEDIA. Home theater costs.
Broad project bands: $1,000–7,000 budget, $13,000–32,000 mid-range, $65,000 and up high-end. - Crutchfield. Speaker placement for home theater.
5.1 surrounds beside or a little behind the listener; 7.1 side and rear channels are different. - Crutchfield. How to hide the wires for your speakers and TVs.
CL2/CL3 cable, low-voltage brackets, fish tape; holes no wider than 40% of a stud, nail plates within 1¼ in of the face. - Electrical Safety Foundation International. Use extension cords properly.
No cords through walls or as permanent wiring; never remove the ground pin. - Electrical Safety Foundation International. Surge protection: keeping your electronics and home safe.
Power strip versus surge protector; protectors wear out; whole-home protection by an electrician. - Equity Residential (2020). Resident handbook (noise and floor coverings).
One landlord’s rule: rugs over at least 75% of hard floors. - Expert Reviews (2026). LG C6 OLED review.
All four HDMI ports support the full HDMI 2.1 feature set; consoles limited to 120 Hz, PCs to 165 Hz. - HDMI Licensing Administrator. HDMI gaming features: VRR, ALLM, QMS.
Variable refresh rate and auto low-latency mode, defined. - HDMI Licensing Administrator. Enhanced Audio Return Channel (eARC).
eARC carries lossless and object audio (TrueHD, DTS-HD MA, Atmos, DTS:X) where both ends support it. - HDMI Licensing Administrator. Ultra High Speed HDMI Cable certification.
Certified 48 Gbps cables for 4K120 and other HDMI 2.1-class signals; certification is per model and length. - HDMI Licensing Administrator. Installing long HDMI runs: active and optical cables.
No maximum length in the spec; active and optical cables for long runs. - International Union of Cinemas (UNIC) (2021). UNIC Cinema Technology Handbook (v2).
Sightline C-values (how far each row’s eye line clears the head in front), vertical viewing limits and off-axis classes. - National Kitchen & Bath Association (2022). Kitchen Planning Guidelines with Access Standards.
36-inch walkways and door-swing clearances, which we apply to living rooms by analogy. - NFPA (2024). Electrical and fire safety at home: cords and power taps.
Cords not through walls or under carpet; power strips plugged straight into a wall outlet. - ProjectorCentral (2019). A simple guide to calculating projector lumens.
Foot-lamberts = lumens × gain ÷ screen area. - Room EQ Wizard. Room Simulation (modal simulator) help.
How rectangular-room modal simulation works and what it leaves out. - RTINGS (2026). When is the best time to buy a TV?.
New lineups in spring; prices near annual lows by Black Friday; last year’s models cleared when new ones arrive. - THX. Viewing Guide FAQ.
The 40° viewing angle (distance = diagonal ÷ 0.835) and keeping the line of sight within 15° of screen center. - THX. Home Theater Room Size Guide.
Room-size bands and soundbar placement directly below the TV. - THX. THX Certified AV receivers: bass management.
Certified receivers must offer an 80 Hz crossover: the basis for 80 Hz as a starting point. - THX. Where should I place my speaker bar?.
Directly below the TV, not above, and not tilted. - UHD Alliance. Filmmaker Mode: frequently asked questions.
What Filmmaker Mode turns off (motion smoothing, sharpening, noise reduction) and what it is for. - UL (2019). Wire and Cable Marking and Application Guide.
What CL2/CL3, CM, riser (R) and plenum (P) markings mean. - What Hi-Fi? (2026). LG C6 (OLED65C6) review.
Four full HDMI 2.1 ports (one with eARC): 4K 120 Hz, VRR and ALLM for consoles; up to 165 Hz for PCs. - Wirecutter (2026). The best time to buy a TV.
November had the year’s best prices in its deal history; late January to the Super Bowl brings many deals.
Rules of thumb (and where they come from)
- Apartment Therapy (2025). My designer friends swear by the two-thirds rule.
The two-thirds sofa/wall and sofa/rug proportions, as designers use them. - Audioholics forum. The 38% Rule (forum thread, Ethan Winer).
Origin and limits of the 38% seating rule. - Cardas Audio. Speaker placement guide: the golden cuboid.
Golden-ratio room and speaker placement folklore. - CNET (2012). TV buying guide: size up your screen (archived).
The HD-era “1.5 to 2 times the diagonal” distance rule. - Crutchfield. Speaker wire: gauge and length.
16 AWG for 8-ohm speakers up to 50 ft; 14 AWG for longer runs or 4–6-ohm speakers. - Crutchfield. The budget audiophile playbook.
About half the budget on speakers: advice for stereo hi-fi, not a theater formula. - Homes & Gardens (2025). The 3-5-7 styling method.
Grouping decorative objects in threes, fives and sevens. - Livingetc (2025). The two-thirds rule for living rooms.
“A proportion cue, not a commandment.” - PS Audio (Copper) (2021). Superposition: getting speaker placement right.
The rule of fifths for speakers and seat. - RealTraps (Ethan Winer). How to set up a room: the 38 percent rule.
Seat 38% of the room length from the front or back wall, as a starting point for measurements. - The Absolute Sound (2022). The magic formula for perfect speaker set-up?! (Jim Smith interview).
The 83% rule: speaker spacing ≈ 0.83 × ear-to-tweeter distance.